Damper for stove and furnace flues.



A. NELSON.

DAMPER FOR STOVE AND FURNACE FLUES. APPLiCATlON FILED AuG. 12.1914.

1,165,]. 15. Patented Dec. 21, 1915.

3 SHEETS-SHEET I.

COLUMBIA PLANOBRAPH CO.,WASHINGTON. D, c.

A. NELSON. DAMPER FOR STOVE AND FURNACE FLUES.

APPLICATION FlLED AUG. 12, 1914- I 1,165,1 1 5. Patented Dec. 21, 1915.

3 $HEET$-$HEET Z.

COLUMBM PLANOORAPH CO-,WASHINGTON,1L c.

A. NELSON.

DAMPER FOR STOVE AND FURNACE FLUES. APPLICATION FILED AUG.l2.-l9l4.

1 165,1 1 5. Patent-ed Dec. 21, 1915.

3 SHEETS-SHEET 3.

Ill/ll COLUMBIA PLANOGRAPH cu. WASHINGTON, u. C.

, OFFICE.

ALFRED NELSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ABRAM COXSTOVE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN-SYLVANIA.

DAMPER FOR STOVE AND FURNACE FLUES.

Patented Dec. 21, 1915.

Application filed August 12, 1914. Serial No. 856,427.

T 0 all whom it may concern Be it known that I, ALFRED NELsoN, a citizenof the United States, residing in Philadelphia, Pennsylvania, haveinvented certain Improvements in Dampers for Stove and Furnace Flues,of. which the following is a specification.

One object of my invention is to improve the construction of dampers forregulating the draft of stoves and furnaces.

Another object of the invention is to make a damper which can be heldineither the full open position or the closed position or in anyintermediate position.

A still further object of .the invention isto simplify the constructionof the damper so that it can be economically manufactured.

In the accompanying drawings: Figure 1 is a front view of the damper inthe closed position, showing it applied to the pipe of a stove; Fig. 2is a sectional plan view on the line aa, Fig. 1; Fig. 3 is an enlargedrear view of the damper removed from the pipe; Fig. 4 is a sectionalplan view on the line 6-7), Fig. 3; Fig. 5 is a sectional view on theline 0-0, Fig. 3, showing the damper closed; Fig. 6v is a view on thesame line, showing the damper in the full open position; and Fig. 7 is asectional view on the line d-cZ, Fig. 6.

Referring to the drawings, 1 is the stove pipe, in the present instance.

2 is the frame of the damper secured to the stove pipe, which is cut outso as to provide a clear opening for the hinged section 3 of the damper.The frame is secured to the pipe by screws or rivets 4.v The hingedportion of the damper has pintles 5 and 6, which project through holesin the frame, as shown in Figs. 1 and 2. The pintle 5 is cast integralwith the frame while the pintle 6 is mounted on a plate? secured to thehinged portion 3 by a bolt 8 so that by removing the bolt the hingedportion of the damper can be detached from the frame.

9 is a handle having a trunnion 10 mount ed in the bearing 11 of theframe 2. The

end of the trunnion is squared, as at 12, and

handle 9 is moved from one side of the damper to the other it will bearupon the projection and will move the pivoted section from the open tothe closed position; In the face of the pivoted section is'a'recess 15and on the handle 9 is a projection 16. This recess has beveled walls,as shown in Figs. 1, 4, and 7, so that when the handle is in theposition illustrated in Fig. 1 the damper is closed and the projection16 rests in the recess 15 of the pivoted section, but when the handle ismoved in the direction of the arrow, Fig. 1, then the projection 16bears against one of the beveled sides of the recess and forces thepivoted section back to the open position, the amount of opening beingcontrolled by the arm 13'.

In order to retain the handle 9 in any position towhich it is adjusted,I form a series of shallow notches 17 in the upper edge of the frame 2,and I form a rib 18 on the handle, which is arranged to enter any one ofthe notches and to retain the handle in any position to which it is adjusted, the spring of the metal of'the handle allowing it to pass theribs forming the notches. The notches radiate from the center of thehandle, as illustrated in Fig. 1. On one end of the rib 18 is aprojection 19 and at each end is a step 20 with which the projection 19engages, as illustrated in Fig. 1, so as to limit the movement of thehandle. 7

By the above construction, it will be seen that I am enabled to make thedamper very cheaply as the parts can be made without machining and canbe easily assembled. The damper can be secured in any position to whichit is adjusted.

I claim:

1. The combination in a damper, of a frame having an opening therein; apivoted section having trunnions mounted in the' lower portion of theframe and arranged to close the opening; a handle having a trunnionmounted in the bearing on the lower portion of the frame; an arm on thetrunnion extending at the back of the pivoted section of the damper; acam-shaped projection at the back of the damper in the path of the arm,the front of the pivoted section of the damper being recessed, saidhandle having a projection adapted to the recessso that when the handleis in one position and the damper is closed the projection is in therecess and when thehandle is notches at its upper edge, the handlehavingla rib arranged to enter any one of the notches as the handle ismoved from one position to another, the handle having a j projection atone end'of the rib; and stops at each side of the frame in the path ofthe Copies of this projectionso. that the movement of the arm in eitherdirection is'limited.

'3. The combination in a damper, of aframe having an opening therein; apivoted section arranged to. close the opening, said v section havingtrunnions at its lowerfedge mounted in openings in'the frame; ahandle;

shaped projection at the rear of the pivoted vportion and cast integraltherewith and arranged in the path of the arm, the face of the pivotedportion having a recess; a projection on the handle arranged to enterthe recess when the damper is closed; a series of recesses in the upperportion of the frame; and a rib on the handle arranged to enter therecesses so as to hold the arm in the position to which-it is adjusted.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

f ALFRED NELSON.

Witnesses:

GERALD OJBRowN, A. BARR.

patent may be obtained for five cents each, by addressing theCommissioner of Patents.

Washington, 13:0.

